Question

Unit digit of 3^ 225?
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Answer 1

Answer:

3

Step-by-step explanation:

3^ 225= 3*3^224= 3*3^4*56= 3*81^56

81^56 ends with 1, as 81 ends with 1, any power of 1 ends with 1

then 3*1=3,

the unit digit of 3^225 is 3

Answer 2

Answer:

3

Step-by-step explanation:

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